Effect of Incorporation of Hydrated Oxides of Sn (IV), Zr (IV) and Fe (III) in a Matrix of the Anion Exchanger Dowex SBR-P on the Sorption Capacity towards the Arsenic (V) Anions

A hybrid organic-inorganic ion-exchanger which consists of the organic anion exchanger Dowex SBR-P and hydrated oxides of Sn (IV), Zr (IV) and Fe (III) was synthesized by sol-gel precipitation. The adsorption properties of hybrid ion-exchanger with various amount of inorganic component were studied towards the anions of arsenic (V). The content of arsenic in the solution and medium acidity were varied and their sufficient influence on the sorption capacity of ion-exchanger was found. In neutral and acidic media organic anion-exchanger Dowex SBR-P found to be ineffective. Introduction of the Sn (IV) and Sn (IV)/Fe (III) hydrated oxides effectively extends the range of action of the anionexchanger to acidic media and significantly improves the adsorption of arsenic (V) from the diluted solutions.